Intermodulation suppression amplifying circuit and control method
A technology of intermodulation suppression and amplifying circuit, which is applied to high-frequency amplifiers and improved amplifiers to improve efficiency. It can solve problems such as main signal loss and in-band flatness, increase capacity, meet adjacent channel interference suppression, and solve The effect of extra loss
Inactive Publication Date: 2013-05-08
SUNWAVE COMM
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[0016] The present invention will be further described below in conjunction with the drawings and embodiments. Although the present invention will be described in conjunction with preferred embodiments, it should be understood that this does not mean that the present invention is limited to the embodiments. On the contrary, the present invention will cover alternatives, improvements, and equivalents that can be included within the scope of the present invention as defined by the appended claims.
[0017] Such as Figure 1 to Figure 2 As shown, this kind of intermodulation suppression amplifier circuit includes a power divider, an adjustable phase shifter, an adjustable gain amplifier, a combiner, a coupler, an adjustable attenuator, and a microcontroller. After the RF signal is input to the power splitter, it is divided into two channels, one channel is amplified by the adjustable gain amplifier 1 after the adjustable attenuator 1 (the signal is inverted), and then part of the s...
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The invention discloses an intermodulation suppression amplifying circuit and a control method. The intermodulation suppression amplifying circuit comprises a power divider, adjustable phase shifters, variable gain adjustable amplifiers, a circuit combiner, couplers, adjustable attenuators and a microcontroller. After radio-frequency signals are inputted to the power divider, the radio-frequency signals are divided into two paths. One path is amplified by a variable gain adjustable amplifier 1 through an adjustable attenuator 1, and then partial signals are coupled out through a coupler 1 and a coupler 2; and in the other path, signals passing through an adjustable phase shifter 1 are mixed in the circuit combiner to counteract main signals, the path of signals counteracting the main signals pass through an adjustable attenuator 2, an adjustable phase shifter 2 and a variable gain adjustable amplifier 2 and then achieve intermodulation suppression with the original path of signals in the couplers, and thus the main signals are outputted. The intermodulation suppression amplifying circuit and the control method have the advantages that through the using of two amplifiers with identical nonlinear characteristics, requirements of adjacent-channel interference suppression, a communication system high target, communication system high performance, and capacity increase in wideband communication are met.
Description
Technical field [0001] The invention relates to an amplifying circuit and a control method, more specifically, it relates to an intermodulation suppression amplifying circuit and a control method. Background technique [0002] Any communication equipment that uses radio frequency signal amplification will suffer from intermodulation suppression. In the past, amplifying circuits generally used filters after the amplifiers to achieve output intermodulation suppression, but inserting filters in the link would cause additional loss of the main signal, and at the same time there would be problems with in-band flatness. Summary of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide an intermodulation suppression amplifying circuit and a control method that meets the interference suppression of adjacent channels in broadband communication, high indicators of the communication system, and high performance. [0004] The pu...
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Inventor 李成恩
Owner SUNWAVE COMM